[gcc] GCC 4.5.0=>4.5.1

gcc/mpfr/log2.c

Index: gcc/mpfr/log2.c
diff --git a/gcc/mpfr/log2.c b/gcc/mpfr/log2.c
deleted file mode 100644
index 233273c3459c080551e6fb9a3725aee4d9a089d0..0000000000000000000000000000000000000000
--- a/gcc/mpfr/log2.c
+++ /dev/null
@@ -1,136 +0,0 @@
-/* mpfr_log2 -- log base 2
-
-Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
-Contributed by the Arenaire and Cacao projects, INRIA.
-
-This file is part of the GNU MPFR Library.
-
-The GNU MPFR Library is free software; you can redistribute it and/or modify
-it under the terms of the GNU Lesser General Public License as published by
-the Free Software Foundation; either version 2.1 of the License, or (at your
-option) any later version.
-
-The GNU MPFR Library is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
-License for more details.
-
-You should have received a copy of the GNU Lesser General Public License
-along with the GNU MPFR Library; see the file COPYING.LIB.  If not, write to
-the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
-MA 02110-1301, USA. */
-
-#define MPFR_NEED_LONGLONG_H
-#include "mpfr-impl.h"
-
- /* The computation of r=log2(a)
-      r=log2(a)=log(a)/log(2)      */
-
-int
-mpfr_log2 (mpfr_ptr r, mpfr_srcptr a, mp_rnd_t rnd_mode)
-{
-  int inexact;
-  MPFR_SAVE_EXPO_DECL (expo);
-
-  if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (a)))
-    {
-      /* If a is NaN, the result is NaN */
-      if (MPFR_IS_NAN (a))
-        {
-          MPFR_SET_NAN (r);
-          MPFR_RET_NAN;
-        }
-      /* check for infinity before zero */
-      else if (MPFR_IS_INF (a))
-        {
-          if (MPFR_IS_NEG (a))
-            /* log(-Inf) = NaN */
-            {
-              MPFR_SET_NAN (r);
-              MPFR_RET_NAN;
-            }
-          else /* log(+Inf) = +Inf */
-            {
-              MPFR_SET_INF (r);
-              MPFR_SET_POS (r);
-              MPFR_RET (0);
-            }
-        }
-      else /* a is zero */
-        {
-          MPFR_ASSERTD (MPFR_IS_ZERO (a));
-          MPFR_SET_INF (r);
-          MPFR_SET_NEG (r);
-          MPFR_RET (0); /* log2(0) is an exact -infinity */
-        }
-    }
-
-  /* If a is negative, the result is NaN */
-  if (MPFR_UNLIKELY (MPFR_IS_NEG (a)))
-    {
-      MPFR_SET_NAN (r);
-      MPFR_RET_NAN;
-    }
-
-  /* If a is 1, the result is 0 */
-  if (MPFR_UNLIKELY (mpfr_cmp_ui (a, 1) == 0))
-    {
-      MPFR_SET_ZERO (r);
-      MPFR_SET_POS (r);
-      MPFR_RET (0); /* only "normal" case where the result is exact */
-    }
-
-  /* If a is 2^N, log2(a) is exact*/
-  if (MPFR_UNLIKELY (mpfr_cmp_ui_2exp (a, 1, MPFR_GET_EXP (a) - 1) == 0))
-    return mpfr_set_si(r, MPFR_GET_EXP (a) - 1, rnd_mode);
-
-  MPFR_SAVE_EXPO_MARK (expo);
-
-  /* General case */
-  {
-    /* Declaration of the intermediary variable */
-    mpfr_t t, tt;
-    /* Declaration of the size variable */
-    mp_prec_t Ny = MPFR_PREC(r);              /* target precision */
-    mp_prec_t Nt;                             /* working precision */
-    mp_exp_t err;                             /* error */
-    MPFR_ZIV_DECL (loop);
-
-    /* compute the precision of intermediary variable */
-    /* the optimal number of bits : see algorithms.tex */
-    Nt = Ny + 3 + MPFR_INT_CEIL_LOG2 (Ny);
-
-    /* initialise of intermediary       variable */
-    mpfr_init2 (t, Nt);
-    mpfr_init2 (tt, Nt);
-
-    /* First computation of log2 */
-    MPFR_ZIV_INIT (loop, Nt);
-    for (;;)
-      {
-        /* compute log2 */
-        mpfr_const_log2(t,GMP_RNDD); /* log(2) */
-        mpfr_log(tt,a,GMP_RNDN);     /* log(a) */
-        mpfr_div(t,tt,t,GMP_RNDN); /* log(a)/log(2) */
-
-        /* estimation of the error */
-        err = Nt-3;
-        if (MPFR_LIKELY (MPFR_CAN_ROUND (t, err, Ny, rnd_mode)))
-          break;
-
-        /* actualisation of the precision */
-        MPFR_ZIV_NEXT (loop, Nt);
-        mpfr_set_prec (t, Nt);
-        mpfr_set_prec (tt, Nt);
-      }
-    MPFR_ZIV_FREE (loop);
-
-    inexact = mpfr_set (r, t, rnd_mode);
-
-    mpfr_clear (t);
-    mpfr_clear (tt);
-  }
-
-  MPFR_SAVE_EXPO_FREE (expo);
-  return mpfr_check_range (r, inexact, rnd_mode);
-}